SU731244A1 - Apparatus for controlling charge of furnace for heating workpiecies - Google Patents

Description

one

The invention relates to controlling the movement of workpieces in heating furnaces and can be used in particular to automate the management of loading heating furnaces with walking beams, in which the latter take on their dimensions during the heating of a sequential series of workpieces.

A device for controlling the loading of the furnace for heating billets is known; to the first, second and third inputs of the control unit 1.

The disadvantages of the known device are the relatively low quality of the final product and the insufficient use of the volume of the furnace working space.

The purpose of the invention is to improve the quality of the final product and the utilization rate of the working space of the furnace.

by minimizing the shear of the blanks as a result of their elongation during heating.

The goal is achieved by the fact that the device is equipped with a block for determining the step of arranging groups of workpieces, connected by its output to the fourth input of the control unit, and by the input to the generator of the step of arranging the blanks.

The drawing shows a block diagram of the proposed device.

Claims (1)

10 The block diagram contains the control object, which are groups 1 and 2 of the workpieces 3, 4, 5 and 6, 7, 8, respectively, the actuator 9 of the pusher and the actuator 10 of the walking beams, the control unit 11, which is connected to the first output with the actuator 9 , and on the second output - with the actuator 10, the setpoint adjuster 12 of the blank layout, which is connected to the first input of the block 11, the workpiece presence sensor 13, which is connected to the second input of the block 11, the pusher position sensor 14, which is connected to the third input of the block 11 and block 15 determining the step of the layout of groups of blanks, which at the entrance with one setpoint 12, and the output - with the fourth input of the block 11. The device operates as follows. After the heating furnace is prepared for loading from the setting device 12 to the first input of the block 11 and to the input of the block 15, a signal is received that corresponds to the width of the workpiece 3 to be supplied to the loading area, the block 11 generates a control signal that turns on the actuator 9 and the pusher moves workpiece 3 in the loading area. After stopping the pusher in the loading zone, block 11 generates a control signal that turns on the actuator 9 in the opposite direction and returns the pusher to its original position, while block 11 measures using sensor 14 and memorizes the path Xs (Xt is the stroke value of the pusher when fed to oven, billet, counted from the rear loading zone), moving the pusher from the stop position in the loading zone to its rear border. Based on the information of the setting device 12 about the width of the workpiece 4 to be supplied to the heating device, block i 1 calculates the value (n is the number of leads, –bm is the fixed length of the step) necessary for moving the walking beams before feeding into the loading zone of the workpiece 4, and forms The driving signal, which includes the actuator 10 and the walking beams move the workpiece 3 to the calculated distance pz-esch. Based on the information about the width of the workpieces 3 and 4 in block 15, their sum is compared with the length –bgl of group 1 being formed and since (83 + 04) 1gr (Si width i of the workpiece is at the input), then from block 15 the enabling signal to the fourth input unit 11, which calculates the stroke of the pusher X4 Xcc-Pz w-§4 and generates a control signal, including the actuator 9 and the pusher moves the workpiece 4 to the calculated distance X 4, with the result that in the heating device the workpiece 3 and 4 are placed close to each other friend, the workpiece 5 is fed to the loading zone in a similar manner ohm and positioned close to the workpiece 4, is formed as a result of one group of blanks 3, 4, 5, and (Sj + S4 + Ss) (S3 + S4 + Ss + Se). Since (5z + S4 + Ss + Se), from block 15 an information signal is sent to the fourth input of block 11, which calculates the nsL value required to move the walking beams before it enters the loading zone of the workpiece 6, and the pusher stroke X Xs - - (Se + 5+ D |). Based on these calculations, block 11 generates control signals, which, respectively, turn on drives 10 and 9 and walking beams move group 1 by the calculated distance Cm-C, and the pusher moves the workpiece b by the calculated distance Xe, with the result that between billets 5 and 6, a desired s-gap equal to 6 + D is formed (S is the accuracy of determining the position of the workpiece in the unloading zone), which, taking into account the length -Swi of group 2, formed similarly to group 1 of blanks 6, 7, 8, corresponds to the required spacing S R2, .2 sj. + 8+ D-e for group 2; similarly, blocks 1 and 15 control the formation of subsequent groups of preforms. As a result, a consecutive series of groups of blanks is formed on the length of the working space of the heating device with the calculated group layout spacing, and within the group - with the layout spacing equal to their width. Due to the use in the device of the unit for determining the step of arranging groups of blanks and its connections with other blocks, a sequential series of groups of blanks are formed along the length of the working space of the heating device with the calculated layout step. The formation of a sequential series of blanks inside the groups is performed with a pickup step equal to their width, therefore, the efficiency of using the working space of the heating device increases and the shift of the blanks is minimized as a result of elongation during heating, B resulting in an increase in the heating device and reduced the reject rate of products of the mill - rolled sheet. Claims An oven loading control device for heating billets comprising pusher drives and walking beams, a control unit connected by a first output to a pusher drive, and a second to a walking beams drive, a billet spacing unit adjuster, a billet position sensor and a pusher position sensor connected respectively to the first, second and third inputs of the control unit, characterized in that, in order to improve the quality of the final product and the utilization rate of the furnace working space Thu minimize shear workpieces from their elongation on heating, it is provided with a block layout determining step workpieces groups connected to its output to a fourth input of the control unit, and an input - setting elements to the blanks layout step. Sources of information taken into account in the examination 1. Design of metallurgical furnaces. Subject Sat № 4, M., "Metallurgists, 1976, p. 26-3.  I I I